Title :
A High-Efficiency Fast-Transient-Response Buck Converter with Analog-Voltage-Dynamic-Estimation Techniques
Author :
Yuh-Shyan Hwang ; An Liu ; Yuan-Bo Chang ; Jiann-Jong Chen
Author_Institution :
Dept. of Electron. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan
Abstract :
A fast-transient-response buck converter utilizing analog-voltage-dynamic-estimation (AVDE) techniques is proposed in this paper. The responses of the proposed buck converter are very fast when load changes between heavy load and light load. The switching frequency of the proposed buck converter is 1 MHz for nominal 3.3 V input and 1.0-2.5 V output range application. Experimental results prove that the proposed scheme improves the transient response to within 2 μs and that its maximum power efficiency can be up to 95%. The maximum load current is 300 mA. The proposed AVDE buck converter has been fabricated with a commercial 0.35 μm CMOS 2P4M process, the total chip area is about 1.5 mm × 1.5 mm, including PADs.
Keywords :
CMOS integrated circuits; power convertors; transient response; AVDE buck converter; CMOS 2P4M process; analog-voltage-dynamic-estimation techniques; current 300 mA; fast-transient-response buck converter; frequency 1 MHz; maximum power efficiency; size 0.35 mum; size 1.5 mm; switching frequency; voltage 1 V to 2.5 V; voltage 3.3 V; Capacitors; Generators; Inductors; Pulse width modulation; Resource description framework; Steady-state; Transient response; Buck converter; derivative output ripple voltage (DORV); pulsewidth modulation (PWM); transient response;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2014.2345459
